Installation on cloudscale.ch

Steps to install an OpenShift 4 cluster on cloudscale.ch.

These steps follow the Installing a cluster on bare metal docs to set up a user provisioned installation (UPI). Terraform is used to provision the cloud infrastructure.

This guide describes the installation with Cilium as the network provider. Cilium is an optional add-on and marked sections should be skipped for clusters which don’t require Cilium. Optional sections are marked with Cilium Optional.

The commands are idempotent and can be retried if any of the steps fail.

The certificates created during bootstrap are only valid for 24h. So make sure you complete these steps within 24h.

This how-to guide is still a work in progress and will change. It’s currently very specific to VSHN and needs further changes to be more generic.

Starting situation

You already have a Tenant and its git repository
You have a CCSP Red Hat login and are logged into Red Hat Openshift Cluster Manager
You want to register a new cluster in Lieutenant and are about to install Openshift 4 on Cloudscale

Prerequisites

docker
mc Minio client (aliased to mc if necessary)
jq
yq yq YAML processor (version 4 or higher)
openshift-install (direct download: linux, macOS)
vault Vault CLI
qemu-img
curl
gzip

Make sure the version of openshift-install and the rhcos image is the same, otherwise ignition will fail.

Cluster Installation

Lieutenant API endpoint

Use the following endpoint for Lieutenant:

VSHN: api.syn.vshn.net

Set up LDAP service

Create an LDAP service

Use control.vshn.net/vshn/services/_create to create a service. The name must contain the customer and the cluster name. And then put the LDAP service ID in the following variable:
```
export LDAP_ID="Your_LDAP_ID_here"
export LDAP_PASSWORD="Your_LDAP_pw_here"
```

Configure input

Access to cloud API

# https://control.cloudscale.ch/service/<your-project>/api-token
export CLOUDSCALE_TOKEN=<cloudscale-api-token>
export TF_VAR_lb_cloudscale_api_secret=<cloudscale-api-token-for-Floaty>

Access to various API

# From https://git.vshn.net/-/profile/personal_access_tokens, "api" scope is sufficient
export GITLAB_TOKEN=<gitlab-api-token>
export GITLAB_USER=<gitlab-user-name>

# For example: https://api.syn.vshn.net
# IMPORTANT: do NOT add a trailing `/`. Commands below will fail.
export COMMODORE_API_URL=<lieutenant-api-endpoint>

# Set Project Syn cluster and tenant ID
export CLUSTER_ID=<lieutenant-cluster-id> # Looks like: c-<something>
export TENANT_ID=$(curl -sH "Authorization: Bearer $(commodore fetch-token)" ${COMMODORE_API_URL}/clusters/${CLUSTER_ID} | jq -r .tenant)

Configuration for hieradata commits

export GIT_AUTHOR_NAME=$(git config --global user.name)
export GIT_AUTHOR_EMAIL=$(git config --global user.email)
export TF_VAR_control_vshn_net_token=<control-vshn-net-token>

OpenShift configuration

export BASE_DOMAIN=<your-base-domain>
export PULL_SECRET='<redhat-pull-secret>' # As copied from https://cloud.redhat.com/openshift/install/pull-secret "Copy pull secret". value must be inside quotes.

For BASE_DOMAIN explanation, see DNS Scheme.

Set up S3 bucket for cluster bootstrap

Create S3 bucket

If a bucket user already exists for this cluster:

# Use already existing bucket user
response=$(curl -sH "Authorization: Bearer ${CLOUDSCALE_TOKEN}" \
  https://api.cloudscale.ch/v1/objects-users | \
  jq -e ".[] | select(.display_name == \"${CLUSTER_ID}\")")

To create a new bucket user:

# Create a new user
response=$(curl -sH "Authorization: Bearer ${CLOUDSCALE_TOKEN}" \
  -F display_name=${CLUSTER_ID} \
  https://api.cloudscale.ch/v1/objects-users)

Configure the Minio client

export REGION=$(curl -sH "Authorization: Bearer $(commodore fetch-token)" ${COMMODORE_API_URL}/clusters/${CLUSTER_ID} | jq -r .facts.region)
mc config host add \
  "${CLUSTER_ID}" "https://objects.${REGION}.cloudscale.ch" \
  $(echo $response | jq -r '.keys[0].access_key') \
  $(echo $response | jq -r '.keys[0].secret_key')

mc mb --ignore-existing \
  "${CLUSTER_ID}/${CLUSTER_ID}-bootstrap-ignition"

Upload Red Hat CoreOS image

Export the Authorization header for the Cloudscale API.
```
export AUTH_HEADER="Authorization: Bearer ${CLOUDSCALE_TOKEN}"
```
The variable CLOUDSCALE_TOKEN could be used directly. Exporting the variable AUTH_HEADER is done to be compatible with the Cloudscale API documentation.
Check if image already exists in the correct zone
```
curl -sH "$AUTH_HEADER" https://api.cloudscale.ch/v1/custom-images | jq -r '.[] | select(.slug == "rhcos-4.10") | .zones[].slug'
```
If a URL is printed to the output, you can skip the next steps and directly jump to the next section.

Fetch and convert the latest Red Hat CoreOS image

curl -L https://mirror.openshift.com/pub/openshift-v4/dependencies/rhcos/4.10/4.10.3/rhcos-4.10.3-x86_64-openstack.x86_64.qcow2.gz | gzip -d > rhcos-4.10.qcow
qemu-img convert rhcos-4.10.qcow rhcos-4.10.raw

Upload the image to S3 and make it public

mc cp rhcos-4.10.raw "${CLUSTER_ID}/${CLUSTER_ID}-bootstrap-ignition/"
mc policy set download "${CLUSTER_ID}/${CLUSTER_ID}-bootstrap-ignition/rhcos-4.10.raw"

You can check that the download policy is applied successfully with

mc policy get "${CLUSTER_ID}/${CLUSTER_ID}-bootstrap-ignition/rhcos-4.10.raw"

The output should be

`Access permission for `[…]-bootstrap-ignition/rhcos-4.10.raw` is `download``

Import the image to Cloudscale

curl -i -H "$AUTH_HEADER" \
  -F url="$(mc share download --json "${CLUSTER_ID}/${CLUSTER_ID}-bootstrap-ignition/rhcos-4.10.raw" | jq -r .url)" \
  -F name='RHCOS 4.10' \
  -F zones="${REGION}1" \
  -F slug=rhcos-4.10 \
  -F source_format=raw \
  -F user_data_handling=pass-through \
  https://api.cloudscale.ch/v1/custom-images/import

Set secrets in Vault

Connect with Vault

export VAULT_ADDR=https://vault-prod.syn.vshn.net
vault login -method=oidc

Store various secrets in Vault

# Set the cloudscale.ch access secrets
vault kv put clusters/kv/${TENANT_ID}/${CLUSTER_ID}/cloudscale \
  token=${CLOUDSCALE_TOKEN} \
  s3_access_key=$(mc config host ls ${CLUSTER_ID} -json | jq -r .accessKey) \
  s3_secret_key=$(mc config host ls ${CLUSTER_ID} -json | jq -r .secretKey)

# Put LB API key in Vault
vault kv put clusters/kv/${TENANT_ID}/${CLUSTER_ID}/floaty \
  iam_secret=${TF_VAR_lb_cloudscale_api_secret}

# Generate an HTTP secret for the registry
vault kv put clusters/kv/${TENANT_ID}/${CLUSTER_ID}/registry \
  httpSecret=$(LC_ALL=C tr -cd "A-Za-z0-9" </dev/urandom | head -c 128)

# Set the LDAP password
vault kv put clusters/kv/${TENANT_ID}/${CLUSTER_ID}/vshn-ldap \
  bindPassword=${LDAP_PASSWORD}

# Generate a master password for K8up backups
vault kv put clusters/kv/${TENANT_ID}/${CLUSTER_ID}/global-backup \
  password=$(LC_ALL=C tr -cd "A-Za-z0-9" </dev/urandom | head -c 32)

# Generate a password for the cluster object backups
vault kv put clusters/kv/${TENANT_ID}/${CLUSTER_ID}/cluster-backup \
  password=$(LC_ALL=C tr -cd "A-Za-z0-9" </dev/urandom | head -c 32)

# Copy the Dagobert OpenShift Node Collector Credentials
vault kv get -format=json "clusters/kv/template/dagobert" | jq '.data.data' \
  | vault kv put -cas=0 "clusters/kv/${TENANT_ID}/${CLUSTER_ID}/dagobert" -

# Copy the VSHN acme-dns registration password
vault kv get -format=json "clusters/kv/template/cert-manager" | jq '.data.data' \
  | vault kv put -cas=0 "clusters/kv/${TENANT_ID}/${CLUSTER_ID}/cert-manager" -

Grab the LB hieradata repo token from Vault

export HIERADATA_REPO_SECRET=$(vault kv get \
  -format=json "clusters/kv/lbaas/hieradata_repo_token" | jq '.data.data')
export HIERADATA_REPO_USER=$(echo "${HIERADATA_REPO_SECRET}" | jq -r '.user')
export HIERADATA_REPO_TOKEN=$(echo "${HIERADATA_REPO_SECRET}" | jq -r '.token')

Prepare Cluster Repository

For the following steps, change into a clean directory (for example a directory in your home).

Check Running Commodore for details on how to run commodore.

Prepare Commodore inventory.

mkdir -p inventory/classes/
git clone $(curl -sH"Authorization: Bearer $(commodore fetch-token)" "${COMMODORE_API_URL}/tenants/${TENANT_ID}" | jq -r '.gitRepo.url') inventory/classes/${TENANT_ID}

Cilium Optional: Prepare Cilium Configuration

Details

Add Cilium to cluster configuration

pushd "inventory/classes/${TENANT_ID}/"

yq eval -i '.applications += ["cilium"]' ${CLUSTER_ID}.yml

yq eval -i '.parameters.networkpolicy.networkPlugin = "cilium"' ${CLUSTER_ID}.yml
yq eval -i '.parameters.networkpolicy.ignoredNamespaces = ["openshift-oauth-apiserver"]' ${CLUSTER_ID}.yml

yq eval -i '.parameters.openshift.infraID = "TO_BE_DEFINED"' ${CLUSTER_ID}.yml
yq eval -i '.parameters.openshift.clusterID = "TO_BE_DEFINED"' ${CLUSTER_ID}.yml

git commit -a -m "Add Cilium addon to ${CLUSTER_ID}"
git push
popd

Compile catalog

commodore catalog compile ${CLUSTER_ID} --push -i

Configure the OpenShift Installer

Starting with this section, we recommend that you change into a clean directory (for example a directory in your home).

Generate SSH key

We generate a unique SSH key pair for the cluster as this gives us troubleshooting access.

SSH_PRIVATE_KEY="$(pwd)/ssh_$CLUSTER_ID"
export SSH_PUBLIC_KEY="${SSH_PRIVATE_KEY}.pub"

ssh-keygen -C "vault@$CLUSTER_ID" -t ed25519 -f $SSH_PRIVATE_KEY -N ''

BASE64_NO_WRAP='base64'
if [[ "$OSTYPE" == "linux"* ]]; then
  BASE64_NO_WRAP='base64 --wrap 0'
fi

vault kv put clusters/kv/${TENANT_ID}/${CLUSTER_ID}/cloudscale/ssh \
  private_key=$(cat $SSH_PRIVATE_KEY | eval "$BASE64_NO_WRAP")

ssh-add $SSH_PRIVATE_KEY

Prepare install-config.yaml

You can add more options to the install-config.yaml file. Have a look at the config example for more information.

For example, you could change the SDN from a default value to something a customer requests due to some network requirements.

export INSTALLER_DIR="$(pwd)/target"
mkdir -p "${INSTALLER_DIR}"

cat > "${INSTALLER_DIR}/install-config.yaml" <<EOF
apiVersion: v1
metadata:
  name: ${CLUSTER_ID}
baseDomain: ${BASE_DOMAIN}
platform:
  none: {}
networking:
  networkType: OVNKubernetes
pullSecret: |
  ${PULL_SECRET}
sshKey: "$(cat $SSH_PUBLIC_KEY)"
EOF

Cilium Optional: Add Cilium

Details

yq eval -i '.networking.networkType = "Cilium"' "${INSTALLER_DIR}/install-config.yaml"

If setting custom CIDR for the OpenShift networking, the corresponding values should be updated in your Commodore cluster definitions. See Cilium Component Defaults and Parameter Reference. Verify with less catalog/manifests/cilium/olm/*ciliumconfig.yaml.

Run the OpenShift Installer

The steps in this section aren’t idempotent and have to be completed uninterrupted in one go. If you have to recreate the install config or any of the generated manifests you need to rerun all of the subsequent steps.

Render install manifests (this will consume the install-config.yaml)

openshift-install --dir "${INSTALLER_DIR}" \
  create manifests

If you want to change the default "apps" domain for the cluster:

yq w -i "${INSTALLER_DIR}/manifests/cluster-ingress-02-config.yml" \
  spec.domain apps.example.com

Cilium Optional: Copy pre-rendered Cilium manifests
Details
cp catalog/manifests/cilium/olm/* target/manifests/

Extract the cluster domain from the generated manifests

export CLUSTER_DOMAIN=$(yq e '.spec.baseDomain' \
  "${INSTALLER_DIR}/manifests/cluster-dns-02-config.yml")

Prepare install manifests and ignition config

openshift-install --dir "${INSTALLER_DIR}" \
  create ignition-configs

Upload ignition config

mc cp "${INSTALLER_DIR}/bootstrap.ign" "${CLUSTER_ID}/${CLUSTER_ID}-bootstrap-ignition/"

export TF_VAR_ignition_bootstrap=$(mc share download \
  --json --expire=4h \
  "${CLUSTER_ID}/${CLUSTER_ID}-bootstrap-ignition/bootstrap.ign" | jq -r '.share')

Terraform Cluster Config

Set team responsible for handling Icinga alerts

# use lower case for team name.
# e.g. TEAM=tarazed
TEAM=<team-name>

Prepare Terraform cluster config

CA_CERT=$(jq -r '.ignition.security.tls.certificateAuthorities[0].source' \
  "${INSTALLER_DIR}/master.ign" | \
  awk -F ',' '{ print $2 }' | \
  base64 --decode)

pushd "inventory/classes/${TENANT_ID}/"

yq eval -i '.applications += ["openshift4-terraform"]' ${CLUSTER_ID}.yml

yq eval -i ".parameters.openshift.infraID = \"$(jq -r .infraID "${INSTALLER_DIR}/metadata.json")\"" \
  ${CLUSTER_ID}.yml

yq eval -i ".parameters.openshift.clusterID = \"$(jq -r .clusterID "${INSTALLER_DIR}/metadata.json")\"" \
  ${CLUSTER_ID}.yml

yq eval -i ".parameters.openshift.baseDomain = \"${CLUSTER_DOMAIN}\"" \
  ${CLUSTER_ID}.yml

yq eval -i '.parameters.openshift.appsDomain = "apps.${openshift:baseDomain}"' \
  ${CLUSTER_ID}.yml

yq eval -i ".parameters.openshift4_terraform.terraform_variables.base_domain = \"${BASE_DOMAIN}\"" \
  ${CLUSTER_ID}.yml

yq eval -i ".parameters.openshift4_terraform.terraform_variables.ignition_ca = \"${CA_CERT}\"" \
  ${CLUSTER_ID}.yml

yq eval -i ".parameters.openshift4_terraform.terraform_variables.ssh_keys = [\"$(cat ${SSH_PUBLIC_KEY})\"]" \
  ${CLUSTER_ID}.yml

yq eval -i ".parameters.openshift4_terraform.terraform_variables.hieradata_repo_user = \"${HIERADATA_REPO_USER}\"" \
  ${CLUSTER_ID}.yml

yq eval -i ".parameters.openshift4_terraform.terraform_variables.team = \"${TEAM}\"" \
  ${CLUSTER_ID}.yml

# Enable proxy protocol on the load-balancer and ingress controller to forward the
# source IP to workloads running on the cluster
yq eval -i ".parameters.openshift4_terraform.terraform_variables.lb_enable_proxy_protocol = true" \
  ${CLUSTER_ID}.yml
yq eval -i ".parameters.openshift4_ingress.ingressControllers.default.endpointPublishingStrategy.type = \"HostNetwork\"" \
  ${CLUSTER_ID}.yml
yq eval -i ".parameters.openshift4_ingress.ingressControllers.default.endpointPublishingStrategy.hostNetwork.protocol = \"PROXY\"" \
  ${CLUSTER_ID}.yml

# Configure the OpenShift update channel
yq eval -i ".parameters.openshift4_version.spec.channel = \"stable-4.10\"" \
  ${CLUSTER_ID}.yml

# Configure default ingress controller with 3 replicas, so that the
# VSHN-managed LB HAproxy health check isn't complaining about a missing backend
yq eval -i ".parameters.openshift4_ingress.ingressControllers.default.replicas = 3" \
  ${CLUSTER_ID}.yml

yq eval -i ".parameters.vshnLdap.serviceId = \"${LDAP_ID}\"" \
  ${CLUSTER_ID}.yml

# Configure Git author information for the CI pipeline
yq eval -i ".parameters.openshift4_terraform.gitlab_ci.git.username = \"GitLab CI\"" \
  ${CLUSTER_ID}.yml
yq eval -i ".parameters.openshift4_terraform.gitlab_ci.git.email = \"tech+${CLUSTER_ID}@vshn.ch\"" \
  ${CLUSTER_ID}.yml

Bootstrap dynamic facts

Some components rely on dynamic facts fetched from the cluster at runtime. Those facts aren’t available before Steward is installed on the cluster.

yq eval -i ".parameters.dynamic_facts.kubernetesVersion.major = \"$(echo "1.23" | awk -F. '{print $1}')\"" \
  ${CLUSTER_ID}.yml
yq eval -i ".parameters.dynamic_facts.kubernetesVersion.minor = \"$(echo "1.23" | awk -F. '{print $2}')\"" \
  ${CLUSTER_ID}.yml

yq eval -i ".parameters.dynamic_facts.openshiftVersion.Major = \"$(echo "4.10" | awk -F. '{print $1}')\"" \
  ${CLUSTER_ID}.yml
yq eval -i ".parameters.dynamic_facts.openshiftVersion.Minor = \"$(echo "4.10" | awk -F. '{print $2}')\"" \
  ${CLUSTER_ID}.yml

You now have the option to further customize the cluster by editing terraform_variables. Most importantly you have the option to change node sizes or add additional specialized worker nodes.

Please look at the configuration reference for the available options.

If you use a custom "apps" domain, make sure to also change it in parameters.openshift.appsDomain.

Commit changes and compile cluster catalog

Review changes. Have a look at the file ${CLUSTER_ID}.yml. Override default parameters or add more component configurations as required for your cluster.

Commit changes

git commit -a -m "Setup cluster ${CLUSTER_ID}"
git push

popd

Compile and push cluster catalog

commodore catalog compile ${CLUSTER_ID} --push -i

Provision Infrastructure

Configure Terraform secrets

cat <<EOF > ./terraform.env
CLOUDSCALE_TOKEN
TF_VAR_ignition_bootstrap
TF_VAR_lb_cloudscale_api_secret
TF_VAR_control_vshn_net_token
GIT_AUTHOR_NAME
GIT_AUTHOR_EMAIL
HIERADATA_REPO_TOKEN
EOF

Setup Terraform

Prepare Terraform execution environment

# Set terraform image and tag to be used
tf_image=$(\
  yq eval ".parameters.openshift4_terraform.images.terraform.image" \
  dependencies/openshift4-terraform/class/defaults.yml)
tf_tag=$(\
  yq eval ".parameters.openshift4_terraform.images.terraform.tag" \
  dependencies/openshift4-terraform/class/defaults.yml)

# Generate the terraform alias
base_dir=$(pwd)
alias terraform='docker run -it --rm \
  -e REAL_UID=$(id -u) \
  --env-file ${base_dir}/terraform.env \
  -w /tf \
  -v $(pwd):/tf \
  --ulimit memlock=-1 \
  "${tf_image}:${tf_tag}" /tf/terraform.sh'

export GITLAB_REPOSITORY_URL=$(curl -sH "Authorization: Bearer $(commodore fetch-token)" ${COMMODORE_API_URL}/clusters/${CLUSTER_ID} | jq -r '.gitRepo.url' | sed 's|ssh://||; s|/|:|')
export GITLAB_REPOSITORY_NAME=${GITLAB_REPOSITORY_URL##*/}
export GITLAB_CATALOG_PROJECT_ID=$(curl -sH "Authorization: Bearer ${GITLAB_TOKEN}" "https://git.vshn.net/api/v4/projects?simple=true&search=${GITLAB_REPOSITORY_NAME/.git}" | jq -r ".[] | select(.ssh_url_to_repo == \"${GITLAB_REPOSITORY_URL}\") | .id")
export GITLAB_STATE_URL="https://git.vshn.net/api/v4/projects/${GITLAB_CATALOG_PROJECT_ID}/terraform/state/cluster"

pushd catalog/manifests/openshift4-terraform/

Initialize Terraform

terraform init \
  "-backend-config=address=${GITLAB_STATE_URL}" \
  "-backend-config=lock_address=${GITLAB_STATE_URL}/lock" \
  "-backend-config=unlock_address=${GITLAB_STATE_URL}/lock" \
  "-backend-config=username=${GITLAB_USER}" \
  "-backend-config=password=${GITLAB_TOKEN}" \
  "-backend-config=lock_method=POST" \
  "-backend-config=unlock_method=DELETE" \
  "-backend-config=retry_wait_min=5"

Create LB hieradata

cat > override.tf <<EOF
module "cluster" {
  bootstrap_count          = 0
  master_count             = 0
  infra_count              = 0
  worker_count             = 0
  additional_worker_groups = {}
}
EOF
terraform apply -target "module.cluster.module.lb.module.hiera"

Review and merge the LB hieradata MR (listed in Terraform output hieradata_mr) and wait until the deploy pipeline after the merge is completed.
Create LBs
```
terraform apply
```
Setup the DNS records shown in output variable dns_entries from the previous step in the cluster’s parent zone. If you use a custom apps domain, make the necessary changes to the DNS record for *.apps.

Make LB FQDNs available for later steps

Store LB FQDNs in environment

declare -a LB_FQDNS
for id in 1 2; do
  LB_FQDNS[$id]=$(terraform state show "module.cluster.module.lb.cloudscale_server.lb[$(expr $id - 1)]" | grep fqdn | awk '{print $2}' | tr -d ' "\r\n')
done

Verify FQDNs

for lb in "${LB_FQDNS[@]}"; do echo $lb; done

Check LB connectivity

for lb in "${LB_FQDNS[@]}"; do
  ping -c1 "${lb}"
done

Wait until LBs are fully initialized by Puppet

# Wait for Puppet provisioning to complete
while true; do
  curl --connect-timeout 1 "http://api.${CLUSTER_DOMAIN}:6443"
  if [ $? -eq 52 ]; then
    echo -e "\nHAproxy up"
    break
  else
    echo -n "."
    sleep 5
  fi
done
# Update sshop config, see https://wiki.vshn.net/pages/viewpage.action?pageId=40108094
sshop_update
# Check that you can access the LBs using your usual SSH config
for lb in "${LB_FQDNS[@]}"; do
  ssh "${lb}" hostname -f
done

While you’re waiting for the LBs to be provisioned, you can check the cloud-init logs with the following SSH commands

ssh ubuntu@"${LB_FQDNS[1]}" tail -f /var/log/cloud-init-output.log
ssh ubuntu@"${LB_FQDNS[2]}" tail -f /var/log/cloud-init-output.log

Check the "Server created" tickets for the LBs and link them to the cluster setup ticket.

Deploy bootstrap node

cat > override.tf <<EOF
module "cluster" {
  bootstrap_count          = 1
  master_count             = 0
  infra_count              = 0
  worker_count             = 0
  additional_worker_groups = {}
}
EOF
terraform apply

Review and merge the LB hieradata MR (listed in Terraform output hieradata_mr) and run Puppet on the LBs after the deploy job has completed
```
for fqdn in "${LB_FQDNS[@]}"; do
  ssh "${fqdn}" sudo puppetctl run
done
```

Wait for bootstrap API to come up

API_URL=$(yq e '.clusters[0].cluster.server' "${INSTALLER_DIR}/auth/kubeconfig")
while ! curl --connect-timeout 1 "${API_URL}/healthz" -k &>/dev/null; do
  echo -n "."
  sleep 5
done && echo -e "\nAPI is up"

Deploy control plane nodes

cat > override.tf <<EOF
module "cluster" {
  bootstrap_count          = 1
  infra_count              = 0
  worker_count             = 0
  additional_worker_groups = {}
}
EOF
terraform apply

Add the DNS records for etcd shown in output variable dns_entries from the previous step to the cluster’s parent zone

Wait for bootstrap to complete

openshift-install --dir "${INSTALLER_DIR}" \
  wait-for bootstrap-complete --log-level debug

Remove bootstrap node and provision infra nodes

cat > override.tf <<EOF
module "cluster" {
  worker_count             = 0
  additional_worker_groups = {}
}
EOF
terraform apply

Approve infra certs

export KUBECONFIG="${INSTALLER_DIR}/auth/kubeconfig"

# Once CSRs in state Pending show up, approve them
# Needs to be run twice, two CSRs for each node need to be approved

kubectl get csr -w

oc get csr -o go-template='{{range .items}}{{if not .status}}{{.metadata.name}}{{"\n"}}{{end}}{{end}}' | \
  xargs oc adm certificate approve

kubectl get nodes

Label infra nodes

kubectl get nodes -lnode-role.kubernetes.io/worker
kubectl label node -lnode-role.kubernetes.io/worker \
  node-role.kubernetes.io/infra=""

Enable proxy protocol on ingress controller

kubectl -n openshift-ingress-operator patch ingresscontroller default --type=json \
  -p '[{
    "op":"replace",
    "path":"/spec/endpointPublishingStrategy",
    "value": {"type": "HostNetwork", "hostNetwork": {"protocol": "PROXY"}}
  }]'

This step is only necessary if you enabled the proxy protocol on the load-balancers.

Review and merge the LB hieradata MR (listed in Terraform output hieradata_mr) and run Puppet on the LBs after the deploy job has completed
```
for fqdn in "${LB_FQDNS[@]}"; do
  ssh "${fqdn}" sudo puppetctl run
done
```

Wait for installation to complete

openshift-install --dir ${INSTALLER_DIR} \
  wait-for install-complete --log-level debug

Provision worker nodes
```
rm override.tf
terraform apply

popd
```

Approve worker certs

# Once CSRs in state Pending show up, approve them
# Needs to be run twice, two CSRs for each node need to be approved

kubectl get csr -w

oc get csr -o go-template='{{range .items}}{{if not .status}}{{.metadata.name}}{{"\n"}}{{end}}{{end}}' | \
  xargs oc adm certificate approve

kubectl get nodes

Label worker nodes

kubectl label --overwrite node -lnode-role.kubernetes.io/worker \
  node-role.kubernetes.io/app=""
kubectl label node -lnode-role.kubernetes.io/infra \
  node-role.kubernetes.io/app-

# This should show the worker nodes only
kubectl get nodes -l node-role.kubernetes.io/app

At this point you may want to add extra labels to the additional worker groups, if there are any.

Create secret with S3 credentials for the registry

oc create secret generic image-registry-private-configuration-user \
--namespace openshift-image-registry \
--from-literal=REGISTRY_STORAGE_S3_ACCESSKEY=$(mc config host ls ${CLUSTER_ID} -json | jq -r .accessKey) \
--from-literal=REGISTRY_STORAGE_S3_SECRETKEY=$(mc config host ls ${CLUSTER_ID} -json | jq -r .secretKey)

Enable Project Syn

Make the cluster Project Syn enabled

Remove bootstrap dynamic facts

pushd "inventory/classes/${TENANT_ID}/"

yq eval -i "del(.parameters.dynamic_facts)" ${CLUSTER_ID}.yml

git commit -a -m "Remove bootstrapping dynamic_facts"
git push
popd

Setup acme-dns CNAME records for the cluster

You can skip this section if you’re not using Let’s Encrypt for the cluster’s API and default wildcard certificates.

Extract the acme-dns subdomain for the cluster after cert-manager has been deployed via Project Syn.

fulldomain=$(kubectl -n syn-cert-manager \
  get secret acme-dns-client \
  -o jsonpath='{.data.acmedns\.json}' | \
  base64 -d  | \
  jq -r '[.[]][0].fulldomain')
echo "$fulldomain"

Add the following CNAME records to the cluster’s DNS zone

The _acme-challenge records must be created in the same zone as the cluster’s api and apps records respectively.

$ORIGIN <cluster-zone> (2)
_acme-challenge.api  IN CNAME <fulldomain>. (1)
$ORIGIN <apps-base-domain> (3)
_acme-challenge.apps IN CNAME <fulldomain>. (1)

1	Replace `<fulldomain>` with the output of the previous step.
2	The `_acme-challenge.api` record must be created in the same origin as the `api` record.
3	The `_acme-challenge.apps` record must be created in the same origin as the `apps` record.

Store the cluster’s admin credentials in the password manager

Once the cluster’s production API certificate has been deployed, edit the cluster’s admin kubeconfig file to remove the initial API certificate CA.

You may see the error Unable to connect to the server: x509: certificate signed by unknown authority when executing kubectl or oc commands after the cluster’s production API certificate has been deployed by Project Syn.

This error can be addressed by removing the initial CA certificate data from the admin kubeconfig as shown in this step.

yq e -i 'del(.clusters[0].cluster.certificate-authority-data)' \
  "${INSTALLER_DIR}/auth/kubeconfig"

Save the admin credentials in the password manager. You can find the password in the file target/auth/kubeadmin-password and the kubeconfig in target/auth/kubeconfig
```
ls -l ${INSTALLER_DIR}/auth/
```

Configure access for registry bucket

OpenShift does configure a PublicAccessBlockConfiguration. Ceph currently has a bug, where pushing objects into the S3 bucket are prevented.

The error message in the docker-registry logs is `s3aws: AccessDenied: \n\tstatus code: 403, request id: tx00000000000003ea93fa6-00112504a0-4fa9e750e-rma1, host id: `.

See tracker.ceph.com/issues/49135 for more information.

Install the aws cli tool
```
pip install awscli
```

Check the current S3 bucket configuration after openshift4-registry has been deployed via Project Syn.

export AWS_ACCESS_KEY_ID=$(mc config host ls ${CLUSTER_ID} -json | jq -r .accessKey)
export AWS_SECRET_ACCESS_KEY=$(mc config host ls ${CLUSTER_ID} -json | jq -r .secretKey)
export REGION=$(curl -sH "Authorization: Bearer $(commodore fetch-token)" ${COMMODORE_API_URL}/clusters/${CLUSTER_ID} | jq -r .facts.region)
aws --endpoint-url "https://objects.${REGION}.cloudscale.ch" s3api get-public-access-block --bucket "${CLUSTER_ID}-image-registry"

Configure BlockPublicAcls to false

aws s3api put-public-access-block --endpoint-url "https://objects.${REGION}.cloudscale.ch" --bucket "${CLUSTER_ID}-image-registry" --public-access-block-configuration BlockPublicAcls=false

Verify the configuration BlockPublicAcls is false

aws s3api get-public-access-block --endpoint-url "https://objects.${REGION}.cloudscale.ch" --bucket "${CLUSTER_ID}-image-registry"

The final configuration should look like this:

{
    "PublicAccessBlockConfiguration": {
        "BlockPublicAcls": false,
        "IgnorePublicAcls": false,
        "BlockPublicPolicy": false,
        "RestrictPublicBuckets": false
    }
}

Finalize installation

Configure the apt-dater groups for the LBs.

git clone git@git.vshn.net:vshn-puppet/nodes_hieradata.git
pushd nodes_hieradata
cat >"${LB_FQDNS[1]}.yaml" <<EOF
---
s_apt_dater::host::group: '2200_20_night_main'
EOF
cat >"${LB_FQDNS[2]}.yaml" <<EOF
---
s_apt_dater::host::group: '2200_40_night_second'
EOF
git add *.yaml
git commit -m"Configure apt-dater groups for LBs for OCP4 cluster ${CLUSTER_ID}"
git push origin master
popd

This how-to defaults to the night maintenance window on Tuesday at 22:00. Adjust the apt-dater groups according to the documented groups (VSHN-internal only) if the cluster requires a different maintenance window.

Wait for deploy job on nodes hieradata to complete and run Puppet on the LBs to update the apt-dater groups.
```
for fqdn in "${LB_FQDNS[@]}"; do
  ssh "${fqdn}" sudo puppetctl run
done
```
Delete local config files
```
rm -r ${INSTALLER_DIR}/
```

Post tasks

Doing a first maintenance
Add the cluster to the maintenance template